User guide

6200T Total Sulfur Analyzer Getting Started
Teledyne Analytical Instruments 69
 remotely through the RS-232/485 serial I/O ports (refer to Appendix A-6
for the appropriate commands)
Sources of zero and span gas must be capable of supplying at least 1.55 L/min.
(maximum 2.5L/min). Both supply lines should be vented outside of the analyzer’s
enclosure. In order to prevent back-diffusion and pressure effects, these vent lines
should be between 2 and 10 meters in length.
3.3.2.4. Pneumatic Layout for Internal Zero/Span (IZS) Gas Generator Option
Figure 3-20 shows the internal, pneumatic connections for the analyzer with the IZS
option installed.
EXHAUST TO OUTER LAYER
OF KICKER
VACUUM MANIFOLD
CRITICAL
FLOW
ORIFICE
CRITICAL
FLOW
ORIFICE
ZERO AIR
SCRUBBER
SAMPLE/CAL
VALVE
Chassis
EXHAUST GAS
OUTLET
SAMPLE GAS
INLET
KICKER EXHAUST
TO PUMP
HYDROCARBON
SCRUBBER
(KICKER)
ZERO AIR INLET
UV
LAMP
PMT
SAMPLE
CHAMBER
FLOW
SENSOR
FLOW / PRESSURE
SENSOR PCA
SAMPLE
PRESSURE
SENSOR
PUMP
IZS
Permeation
Tube
SO
2
Source
ZERO/SPAN
VALVE
SAMPLE FILTER
Figure 3-20: Pneumatic Layout with IZS Options
The internal zero air and span gas generator (IZS) option includes a heated enclosure
(Section 3.3.2.5) for a permeation tube (permeation tube must be purchased separately;
see Section 1.4, in SO
2
IZS Permeation Tubes option), an external scrubber (Section
3.3.2.7) for producing zero air and a set of valves for switching between the sample gas
inlet and the output of the zero/span subsystem, functionally very similar to the valves
included in the zero/span valve option.
Table 3-11 describes the operational state of the valves associated with the IZS option
during the analyzer’s various operating modes.
Table 3-11: IZS Valve Operating States
MODE VALVE CONDITION
SAMPLE
Sample/Cal Open to SAMPLE inlet
Zero/Span Open to ZERO AIR inlet